duk_util_bitencoder.c File Reference

#include "duk_internal.h"

Go to the source code of this file.

Functions
DUK_INTERNAL void	duk_be_encode (duk_bitencoder_ctx *ctx, duk_uint32_t data, duk_small_int_t bits)
DUK_INTERNAL void	duk_be_finish (duk_bitencoder_ctx *ctx)

Function Documentation

duk_be_encode()

DUK_INTERNAL void duk_be_encode	(	duk_bitencoder_ctx *	ctx,
		duk_uint32_t	data,
		duk_small_int_t	bits )

Definition at line 7 of file duktape-1.5.2/src-separate/duk_util_bitencoder.c.

                                                                                                  {
    duk_uint8_t tmp;
 
    DUK_ASSERT(ctx != NULL);
    DUK_ASSERT(ctx->currbits < 8);
 
    /* This limitation would be fixable but adds unnecessary complexity. */
    DUK_ASSERT(bits >= 1 && bits <= 24);
 
    ctx->currval = (ctx->currval << bits) | data;
    ctx->currbits += bits;
 
    while (ctx->currbits >= 8) {
        if (ctx->offset < ctx->length) {
            tmp = (duk_uint8_t) ((ctx->currval >> (ctx->currbits - 8)) & 0xff);
            ctx->data[ctx->offset++] = tmp;
        } else {
            /* If buffer has been exhausted, truncate bitstream */
            ctx->truncated = 1;
        }
 
        ctx->currbits -= 8;
    }
}

References duk_bitencoder_ctx::currbits, duk_bitencoder_ctx::currval, duk_bitencoder_ctx::data, DUK_ASSERT, duk_bitencoder_ctx::length, NULL, duk_bitencoder_ctx::offset, and duk_bitencoder_ctx::truncated.

Referenced by duk_be_finish().

duk_be_finish()

DUK_INTERNAL void duk_be_finish

(

duk_bitencoder_ctx *

ctx

)

Definition at line 32 of file duktape-1.5.2/src-separate/duk_util_bitencoder.c.

                                                         {
    duk_small_int_t npad;
 
    DUK_ASSERT(ctx != NULL);
    DUK_ASSERT(ctx->currbits < 8);
 
    npad = (duk_small_int_t) (8 - ctx->currbits);
    if (npad > 0) {
        duk_be_encode(ctx, 0, npad);
    }
    DUK_ASSERT(ctx->currbits == 0);
}

References duk_bitencoder_ctx::currbits, DUK_ASSERT, duk_be_encode(), and NULL.